This soup is AWESOME!!! I didn't have leeks so I left those out. I added some red potatoes sliced thin. I also didn't have any celery...but, I did have dried celery flakes so I added that instead. I ended up using more butter than it called for because I added the potatoes. But, the end result....YUMMY! Thank you so much for this recipe. (All I did was Google mushroom soup and I picked this recipe....Good choice on my part!)